Aggregator
Blog
Creative Commons
Facebook
Flickr
Instant Messaging
MUVE
MySpace
Ning
PLN
Podcast
RSS
Social Bookmarking
Social Networking
Tags
Texting
Twitter and Plurk (microblogging)
User Generated Content (USG)
Web 2.0
Wiki
YouTube
Some places to start or refresh your understanding:
Aggregator
Blog
Creative Commons
Facebook
Flickr
Instant Messaging
MUVE
MySpace
Ning
PLN
Podcast
RSS
Social Bookmarking
Social Networking
Tags
Texting
Twitter and Plurk (microblogging)
User Generated Content (USG)
Web 2.0
Wiki
YouTube
Some places to start or refresh your understanding:
Alexandria Samuels' Glossary of Web 2.0
Collaboration 2.0 Glossary